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Rheoliadau Gwerthoedd Terfyn Ansawdd Aer (Cymru) 2002
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- 2002 No. 3183 (Cy. 299)
- ATODLEN 4
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Rheoliad 8(4)
ATODLEN 4MEINI PRAWF AR GYFER CANFOD ISAFSYMIAU'R PWYNTIAU SAMPLU AR GYFER MESURIADAU SEFYDLOG CRYNODIADAU'R LLYGRYNNAU PERTHNASOL YN YR AER AMGYLCHYNOL
RHAN IIsafswm y pwyntiau samplu ar gyfer mesuriadau sefydlog i asesu a ydys yn cydymffurfio â gwerthoedd terfyn ar gyfer diogelu iechyd pobl a throthwyon rhybuddio mewn parthau a chrynoadau os mesuriadau sefydlog yw'r unig ffynhonnell wybodaeth
Ffynonellau gwasgarog
| Poblogaeth y crynhoad neu'r parth (miloedd) | Os yw'r crynodiadau yn uwch na'r trothwy asesu uchaf | Os yw'r crynodiadau uchaf rhwng y trothwy asesu uchaf a'r trothwy asesu isaf | Ar gyfer SO2 ac NO2 mewn crynoadau lle mae'r crynodiadau uchaf islaw'r trothwyon asesu isaf |
|---|---|---|---|
| 0—250 | 1 | 1 | ddim yn gymwys |
| 250—499 | 2 | 1 | 1 |
| 500—749 | 2 | 1 | 1 |
| 750—999 | 3 | 1 | 1 |
| 1 000—1 499 | 4 | 2 | 1 |
| 1 500—1 999 | 5 | 2 | 1 |
| 2 000—2 749 | 6 | 3 | 2 |
| 2 750—3 749 | 7 | 3 | 2 |
| 3 750—4 749 | 8 | 4 | 2 |
| 4 750— 5 999 | 9 | 4 | 2 |
| > 6 000 | 10 | 5 | 3 |
| Ar gyfer NO2 a mater gronynnol: i gynnwys o leiaf un orsaf â chefndir trefol ac un orsaf sy'n cyfeirio at draffig — bydd y gofyniad hwn yn gymwys i bensen a charbon monocsid ar yr amod nad yw'n cynyddu nifer y pwyntiau samplu. |
Ffynonellau pwynt
(b)I asesu llygredd yng nghyffiniau ffynonellau pwynt, dylid cyfrifo nifer y pwyntiau samplu ar gyfer mesuriadau sefydlog gan gymryd i ystyriaeth ddwyseddau allyriannau, patrymau dosbarthiad tebygol y llygredd yn yr aer amgylchynol a datguddiad posibl y boblogaeth.
RHAN IIIsafswm y pwyntiau samplu ar gyfer mesuriadau sefydlog i asesu a ydys yn cydymffurfio â gwerthoedd terfyn ar gyfer diogelu ecosystemau neu lystyfiant mewn parthau heblaw crynoadau
| Os yw'r crynodiadau uchaf yn uwch na'r trothwy asesu uchaf | Os yw'r crynodiadau uchaf rhwng y trothwy asesu uchaf a'r trothwy asesu isaf |
|---|---|
| Mewn parthau ar ynysoedd, dylid cyfrifo nifer y pwyntiau samplu ar gyfer mesuriadau sefydlog gan gymryd i ystyriaeth batrymau dosbarthiad tebygol y llygredd yn yr aer amgylchynol a datguddiad posibl yr ecosystemau neu'r llystyfiant. | |
| 1 orsaf i bob 20,000 km2 | 1 orsaf i bob 40,000 km2 |
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